The first two series continued the trend set by producer David Rose with Z-Cars, and transmitted the majority of episodes live.

The series will transmit this year.

The final series of six episodes transmitted between February and March 2002, though popular with most ITV regions and viewers, many rejected to showing the series - due to Barrymore's situation at the time.

The system works by having a series of LF (low frequency 125 kHz) transmitting antennas both inside and outside the vehicle.

It was adapted by Constance Cox as an eleven-part series of half-hour episodes first transmitted from 16 October 1959.

The New York City Fire Department utilizes a series of radio bell code signals and 10-code signals to transmit and relay information during general department operations and during emergency situations.

He had from time to time carefully transmitted to England his journals and notes, and a copious series of letters, so very few details of his journeys have been lost.